    <html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">
    <head>
      <title>Filter sanity-check</title>
      <style type="text/css">
      html, body { margin: 0; background: white; height: 100%; width: 100%; }
      body { position: relative; }
      </style>
    </head>
    <body>

    <div style="position: absolute; top: 50px; left: 10px; width: 100px; height: 10px; background: black"></div>

    <div style="position: absolute; top: 70px; left: 10px; width: 94px; height: 4px; border: 3px solid #000;"></div>

    </body>
    </html>
